For ordinary pregnant women, gestational sac can be found by B-ultrasound about 35 days after menopause, and fetal heart germ will appear 7-8 weeks after menopause. If menopause lasts for more than 2 months, and there is no fetal heart, no embryo, or only embryo without fetal heart, then it is necessary to consider whether there is a fetal abortion.
For normal intrauterine pregnancy, embryo bud and fetal heart tube pulsation can be seen by B-ultrasound in 6-7 weeks of pregnancy. If there is still no embryo and fetal heart after seven weeks of pregnancy, pregnant mothers should consider the possibility of embryo stop developing and go to the hospital to check the fetal condition in time. Because of the development of embryo, embryo sac is formed in 30-40 days of pregnancy, embryo bud is formed in 40-50 days of pregnancy, and fetal heart is formed in 50-60 days of pregnancy. For normal intrauterine pregnancy, generally after 42 days after menopause, B-ultrasound can clearly see the embryo buds in the uterus and the heartbeat of the fetal heart tube. Some women with irregular menstrual cycle, or late ovulation and late implantation of fertilized eggs have embryonic buds in the uterus, and the beating time of fetal heart tube will be relatively delayed, but it will not exceed 49 days after menopause and not exceed 56 days at the latest. In short, pregnant mothers who have no embryo and fetal heart before 8 weeks of pregnancy and have no abnormal conditions can stay in bed for 1 or 2 weeks before reexamination. There are great changes in the embryonic period every day. For example, there is no fetal heart after 50 days of menopause, and it may come out in 5 1 day.
In general, self-monitoring is not allowed before 15 weeks of pregnancy. For pregnant women with 15~28 weeks, it is safe to start monitoring the fetal heart rate at home, three times a day, each time 1 minute. In the first three months of pregnancy, because of the position of the fetus, or other interference factors, such as the mother's fat is too thick, even with extremely sophisticated instruments, fetal heart sounds can not be heard. The fetus may have a heartbeat as early as 10 week of pregnancy. Before 24 weeks of pregnancy, fetal heart sounds were mostly below the navel.
The best time to check fetal heart rate during pregnancy.
I heard that a friend of my mother asked her if she could hear the fetal heart with a stethoscope. In fact, she can hear the fetal heart at about 8 weeks of pregnancy, but at this time, the fetal heart sound is very light and must be heard by Doppler fetal heart. It takes about 17- 18 weeks to listen to the fetal heart with a stethoscope. If you are not a professional medical staff, you may need to put a stethoscope on your abdomen and check it carefully before you can hear it. Therefore, it is not recommended for pregnant women to listen to the fetal heart with a stethoscope at home, so as not to hear the fetal heart clearly and judge the baby's health in time. They can choose professional fetal heart surgery at home. Apply coupling agent, water or cooking oil to the abdomen. Use a coupling agent, because ultrasonic waves are easily dissipated in the air. Its function is to squeeze out the air in the pores of the skin and make the probe in close contact with the skin. Open the fetal heart, put the probe on the abdomen and start looking for the location of the fetal heart.